Finding the Fourth Proportional to 10,662.22, 15,973.89 and 7,858

Step by Step Solution

1. Step 1: Write the proportion equation
   10,662.22 : 15,973.89 = 7,858 : x
2. Step 2: Convert to fraction form
   10,662.22/15,973.89 = 7,858/x
3. Step 3: Cross multiply
   10,662.22x = 15,973.89 × 7,858
4. Step 4: Simplify right side
   10,662.22x = 125,522,827.62
5. Step 5: Solve for x
   x = 125,522,827.62/10,662.22
6. Step 6: Final answer
   x = 11,772.67